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FRANCIS JUST, OF BUFFALO, NEW YORK.

Lam Patent No. 62,036, ma February 12, 1867. i

IMPROVEMENT INDUOR LOCKS.

TO ALL WHOM IT MAY CONCERN Be it known that I, FRANCIS JUST, of thelcity of Bulalo, in the county of Erie, and in the State of New York,have invented a new and improved Lock; and Ido hereby declare that thefollowing is a full and clear and exact description thereof, referencebeing `had to the annexed drawing, making a part of this specification,in which- Figure I is a vertical view of the working model, rshowing thesame in its various parts and operations.

Figure His a sectional cut ofthe lock bolt A, tumblers B B. inconjunction` with the key, so as to show the tumblers when lifted out ofbolt A.

Figure III is a side'view of the latch bolt C.

A is the lock bolt, peculiarly constructed at the place where the keybit takes hold, in order to move said bolt. This mode offers greatersecurity against picking than the common device. B B are two tumblers.They are placed one below and the other on the top of bolt A. These arefor the purpose of locking said bolt. C is the latch bolt, constructedso as to answer for either right or lefthand use. This latch bolt isprovided with four notches, the object of which will be hereafter shown(D is a double lever, having one end connected with C, and the other endwith E.A Thist'ransfers motion from E to C and furnishes a simple modeof changing latch C to either rightV or left-hand use. E is a strap, bymeans of which C- and D are brought in contact with the latch hub. F Fare two catchers,` intended to interfere with the turning of the key, sothat when the key is entered the key-hole in the usual way the keycannot be turned so as to `reach bolt A and tumblers B B, thuspreventing any one not familiar with the principle of construction ofsaidlock from either opening or locking it.

In order to lock this lock the key is first inserted into the lock thewrong way, so that -the key bit enters the key-hole down side up; `then4the latch is to be pushed in or withdraw-n and the key turned from theleft to the right hand this moves the catch F right-hand side down so itwill lie in a notch in latch bolt C. Then the key is to be withdrawnfrom the lock and put in again in the usual way, and then turned from`the right to the left; this moves the lock bolt A. Now push in orwithdraw the latch entirely; this sets free the catch F. If now the'latchis withdrawn half-way the key might then be turnedclear round andtaken out of the lock. To open the lock the key is likewise insertedwrong; the latch is to be withdrawn halfway, and th'enthe key turned tothe left; this will move down the catch` F on left side and cause to lieinto a notch in latch, as itis shown in drawing. Then take the keyl outof the lock and again insert itin the usual way; turn it from the leftto the right; this will open the lock. In order to withdraw the keymovethe latch clear back and turn the key further round; i i

Claims. A

1. I claim, in combination with tumblers B B and a key bit, the bolt A,when constructed and operated as shown. i

2. I claim the catches F F in combination with a key bit for the purposespecied.

FRANCIS JUST.

Witnesses:

H. RATHMANN, H. WM. DOPP.

